Flood protection for aquatic organisms: Bedload plays an important role

A flood causes stress for organisms living in a watercourse. Their survival depends on factors such as whether there are refuge habitats to which they can retreat. Researchers from the Laboratory of Hydraulics, Hydrology and Glaciology and Eawag studied how river widening as part of restoration measures improves potential refugia availability. They showed that refugia provision and thereby the protection of biodiversity depends crucially on the supply of bedload.

Bedload
Dynamic river widenings, which provide more refugia for aquatic organisms during floods, strongly depend on the so-called bedload balance. (Photo: VAW / D-BAUG, ETH Zurich)

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Original publication:
Cristina Rachelly, Kate L. Mathers, Christine Weber, Volker Weitbrecht, Robert M. Boes & David F. Vetsch
external page How does sediment supply influence refugia availability in river widenings?
Journal of Ecohydraulics (2021), doi: 10.1080/24705357.2020.1831415

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